The short answer: earwigs are a moisture problem, so dry the perimeter first. Pull mulch back off the foundation, water deeply in the morning instead of at night so the surface dries out, and fix leaky hose bibs and downspouts. Trap them with a rolled damp newspaper or a shallow dish of oil left out overnight, then seal the low gaps and worn door sweeps. If they still push in during the July heat, a perimeter barrier stops them at the foundation.
Earwigs unsettle people out of proportion to how harmless they are. The pincers look like a weapon, the name comes with a creepy myth, and finding a cluster of them in the bathtub on a July morning is genuinely unpleasant. The upside is that earwigs are one of the most do-it-yourself-friendly pests there is, because they live and die on moisture. Get the water right and you solve most of it before anyone sprays anything. Here is the homeowner plan, and the point where a barrier is worth it.
Why the valley grows so many
Earwigs are a moisture story, and the Treasure Valley runs on moisture. This is high desert, where the ground should be too dry for them to build up. But almost nothing here is left to nature: pressurized irrigation feeds lawns all summer, drip lines run through the beds, and canals carry water across the valley. All that watering creates the cool, damp, shaded habitat earwigs need, dropped into a climate that should not support many of them. They spend the day tucked under mulch, landscape fabric, pots, and debris, then come out at night to feed. When the hottest, driest weeks of July and August dry out the surface, they chase moisture toward the house, which is exactly the push explained in why earwigs come indoors in summer. The same watering that draws them is why you often see a jump in bugs after irrigation, covered in why you see more bugs after watering or rain.
Dry it out: the DIY that works
Habitat comes first with earwigs. Fix the water and you starve the population before you ever reach for a spray.
- Switch to deep morning watering Long, infrequent morning waterings let the surface dry out by nightfall, which earwigs hate. Frequent evening watering keeps everything damp after dark, exactly when they come out to feed. This one change does more than any product.
- Pull the mulch back and thin it Keep mulch to a couple of inches and leave a few inches of bare, dry soil between the beds and the foundation. A thick, wet mulch layer against the house is prime earwig harborage.
- Clear the daytime hideouts Boards, bricks, flowerpots, leaf piles, and yard clutter sitting on the ground are where earwigs shelter by day. Pick them up or move them well away from the walls.
- Fix the water you did not mean to have A dripping hose bib, a downspout dumping against the foundation, or a low spot that stays soggy all feed the population. Redirect the water and dry the ground out.
- Trap them overnight Lay a rolled damp newspaper or a short cardboard tube in the beds and along the foundation in the evening. Earwigs crawl inside to hide from daylight, and in the morning you shake the whole thing into a bucket of soapy water. A shallow can with a little vegetable oil, sunk to the rim, works the same way.
- Seal the low gaps Fit tight sweeps on exterior doors, seal ground-level gaps around pipes, and screen the foundation weep holes on brick and stone-veneer homes. Do not caulk the weep holes shut, since they drain the wall; screen them so water gets out and earwigs cannot get in.
Before you panic: the pincers are basically harmless. A big earwig can give a very light pinch if you pick it up, but it cannot meaningfully break the skin, it has no venom, and it is no threat to people, kids, or pets. And no, they do not crawl into ears. That is old folklore, not behavior. Earwigs hunt damp, tight spaces, not you, so this is a nuisance to manage, not a danger to fear.
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Get a Free Quote →What DIY can and cannot fix
Moisture control and traps handle a lot of earwig problems on their own, which is why this pest rewards do-it-yourself more than most. Where DIY runs short is a heavy irrigation year or a shaded, damp lot that stays wet no matter how you water, and traps only ever dent a big population rather than end it. When they keep pushing in through the July heat, a perimeter treatment is what stops them at the foundation. Our earwig control service pairs the moisture advice with non-repellent products labeled for earwigs and a barrier around the low walls, so the ones that survive the dried-out yard still cannot reach your kitchen. Earwigs also share the damp, dark habitat that draws silverfish, so the same fixes pay off against both, and the full profile of the insect is in earwigs in Idaho.
Earwig questions, answered
What is the best homemade earwig trap?
A rolled-up damp newspaper or a short piece of cardboard tube left out overnight is the classic, and it works. Earwigs crawl inside to hide from daylight, and in the morning you shake the whole thing into a bucket of soapy water. A shallow can with a little vegetable oil, sunk to the rim in a bed, catches them the same way. Set several near the foundation and the damp spots where you see them.
Does dish soap or diatomaceous earth kill earwigs?
Both can, with limits. A spray of soapy water kills earwigs it hits directly, so it is good for a cluster you can see. Diatomaceous earth kills them as they crawl through it, but only while it stays bone dry, and it stops working the moment it gets wet from watering or dew. Since earwigs live in damp places, keep that limitation in mind and lean on moisture control and traps.
Why do I find earwigs in my bathroom and kitchen sink?
They are chasing moisture. Earwigs are outdoor insects that wander in during hot, dry spells looking for damp, and the bathroom, kitchen, and laundry room are the wettest rooms in the house. Some come up through floor drains or gather in a sink or tub overnight where a little water sits. Finding them there points you at the damp, low entry points to seal and dry out.
Will earwigs infest or breed inside my house?
No. Earwigs cannot really build up indoors the way a true indoor pest does. The ones inside wandered in from outside, so you are seeing an entry problem, not a breeding population in your walls. That is good news, because it means drying the perimeter, sealing the low gaps, and trapping the ones that get in actually solves it, rather than chasing a hidden nest that is not there.
Do earwigs damage my vegetable garden?
They can, and they help too. Earwigs chew ragged holes in seedlings, soft fruit, and flower petals, and they can wreck a tray of starts or a bed of dahlias. The same earwigs also eat aphids, mites, and insect eggs, so they do real cleanup out in the beds. The goal is balance: trap and reduce them around vulnerable plants and the foundation, not wipe out every earwig in the yard.